Excavating shovel



Filed June 4, 193'? 7 Sheets-Sheet 1 DV'VENTOR.

R W 5 R m M W AT ORNEY.

July 8 1941. v BAKER 2,248,326

EXCAVATING SHOVEL Filed June 4, 1937 7'Sheets-Sheet 2 INVENTOR. WAL TER BAKE'R ATTORNEY.

July-8,1941 4 w. BAKER I 2,248,326

' EXCAVATING SHOVEL Filed June 4. 1937 '7 Sheet-Sheet 3 INVENTOR. W44 75/? 5/4 KER ATTORNEY.

July 8, 1941. w, BAKER Y 1 2,248,326

'EXGAVATING snow. I Filed June 4, 1937 7 Sheets-Sheet! INVENTOR. WAL TEA BA KER ATTORNEY.

EXCAVATING SHOVEL 7 mad June 4. 19:7 7 Shasta-Sheet s INVENTOR. WAL 75/? BA K ER ATTORNEY.

July 8,1941. w. BAKER 2,248,326

EXCAVATING saovm.

Filed June 4, 1937 '7 sheets-sheet 6 INVENTOR. WAL 75/? BA KER BY Z ATTO Jul 8, 1941. B KE 2,248,326

EXCAVATING SHOVEL Filed June 4. 1957 7 Sheets-Sheet 7 INVENTOR. WALTER v BAKE/7 ATTORNEY.

' it takes too long employed either 'shovelsflwhich may 'i-ng drawings Patented July 8, 1941 Walter Baker, mm as! Cedar Rapids,

nts, to Link-Belt Speeder Cor- Iowa, assignor, by

poration, a corporation of Illinois i Application June 4, 1937, Serial No. 146,471

.11 Claims. (Cl. 214-135) a This invention relates to excavating shovels and has particular relation to means for rotating the The drivin one job to another the track speed is so low that to transport the shovel under its own power and heavy trucks must be employed for the purpose. Of course, higher gearing may be employed but obviously this would not furnish sufllcient power to the track when the shovel was n use.

While mmtiple-speed mechanisms have been proposed for excavating multiple speeds at the prime. mover resulting in multiple speeds of all operations or have been confined to the mounting of complex gear arrangements under the turn table shovels such devices have v or in-the lower deck where they are inaccessible and subject to; excessive wear and clogging due to being close to the ground and obstacles such as stones and the like.glessening ground clearance.

- It is accordingly an object of my invention to provide a plural speed drive for excavating shovels and the like.

It is a more specific object of my invention to providea plural speed drive for excavating be incorporated in the usual shovel structure without material change thereof.

It is an object of my invention to provide a simple and accessible multiple speed mechanism with a minimum number of working parts.-

It is another object of my invention to provide a new and improved excavating shovel and a new and improvedmeans for moving the shovel from onaiob to another.

her and further features and objects of the invention will be more apparent to those skilled in the art upon a consideration of the accompanyand following specifications. wherein is disclosed a single exemplary embodiment of the invention, with the understanding, how ever, that such changes may be made therein as. fall within the scope of the appended claimswithout departing from the spirit of the inven-' tion. 1 In said drawings:

. engine indicated "at Figure 1w is a view in perspective of the left side of an excavating hovel constructed accord- 1, 8 to my invention. A a

Figure 2 is a view in perspective of the right side of the shovel s55 wn in Figure 1. a

Figure 3 is a view i r rperspective of the engine, hoisting drums, and operating mechanisnrof the device shown in Figures 1 and 2.

Figure 4 is a plan view in diagrammatic relation of the drive of a shovel constructed according to my invention.

Figure 5 is a view in elevation in diagrammatic relation of the drive mechanism shown in Figures 1 to 4 inclusive. I

Figure 6 is a view from beneath the shovel illustrating the running gear and running gear drive.

- 'Figure '7 is a view in section of the track drive gearing with the double jawed clutch in engagement with the high speed gear and Figure 8 is a-view in section'of a portion of the drive shown in Figure '7 with the clutch in engagement with the slow speed gears.

A shovel constructed according" to my invention has an upperrevolving frame ID on which aboom ii is pivotally mounted. The A-frame legs I2 and I3 are adapted'to support the boom by means, of boom hoist cables ll. The dipper stick it is mounted for in and out movement on dipper stick roller l1 and is either thrust downwardly by means of a crowding drum i8- or retracted by means of cable ls'which is operated by reversing the crowding drum IS, the reverse being accomplished by means of thechain drive indicated at 2|. The shovel 22, of the usual type, is adapted to be swung for digging by means of the cables and sheaves indicated generally at 23 and these are actuated by means of the hoisting drum 24; The door 26 of the shovel 22 may be opened or tripped by means of the trip rope 21 which may be pulled 'bythe operator by hand.

Power for operating the various sheaves and driving the excavating shovel is ed by means of any prime mover such as the gasoline 3!. The upper. revolving frame is mounted for rotation on the turntable 32 and is preferably mounted on the turntable bymeans of rollers 33 which permit the turntable to rotate in accordance with the usual turntable drive hereinafter discussed. The turn-. table '32 is mounted on a lower frame 34 and A tread drive sprocket 31 at one end of each shaft I6I, called the swing shaft,

of the tread frames36, and tread rollers 38 at the other end of the tread frames 36, aiford means by which the endless tracks 39 may be rotatably mounted. The springs 4| serve as takeups for the idler wheels 38 and also serve to relieve stress on the idler sprockets in the event that any stones or the like get into the track. The portions of the tracks 39 which are in contact with the ground are held in relatively flat position by means of a plurality of rollers 43.

.Retuming now to the drive gearing, and referring more particularly to Figures 4 and 5, the

prime mover 3| is adapted to drive a large sprocket wheel 46 by means of a chain 41 or other suitable drive means. The sprocket wheel 46 is mounted on the main power shaft 46. The main power shaft 48 is adapted to drive a reverse shaft 49 by means of a pinion 5| on shaft 48 and a gear 52 which is mounted on the reverse shaft 49. The gear 52 in turn drives a front drum gear 53 and a rear drum gear 54, the front drum gear being mounted on a front drum shaft 56 and the hoisting drumgear- 54 being mounted upon a hoisting shaft 51. The crowding drum or front drum I8 is keyed to theshaft 56 but the shaft may be engaged or disengaged at will to the gear 53 by means of a clutch indicated at 63. The shaft 56 may also be engaged or disengaged to a reversing clut ch indicated at 64 to reverse the direction of rotation of the drum I8, the drive for reversing the drum being afforded-by means of a sprocket chain 66 and a sprocket gear 61 on clutch 64 and another sprocket gear 68 on the shaft 49. The hoisting drum 24 may be engaged to the hoisting drum gear 54 by means of a clutch indicated ,at 13.

Reverse action of the drum. of course, is afforded by means of the weight of the boom.

A boom hoist drum 12 is provided for winding the boom hoisting cables I4 and this drum is adapted to. be driven by means of a sprocket 14 .which maybe engaged .or disengaged to the shaft 49 by means of clutch 16. The sprocket 14 drives a chain 11 which in turn drives a sprocket 18 and this sprocket is mounted on a shaft 19. The shaft 19 rotates a pinion 8| which in turn drives a gear 82 to rotate the boom hoist drum 12.

The track 39 is adapted to be rotated by means of the shafting and gearing which I am about to describe. The reverse'gearshaft 49 has a pair of clutches 86 and 81 and these are adapted to rotate a forward drive bevel gear 88 and a reverse bevel gear 89/ These bevel gears rest on and drive horizontally disposed bevel gear 9| and this gear is pinned to'the ver'tical drive shaft 92. Normally the shaft 92 is engaged to a. drive gear 93 gear 94 and a third traction drive gear 96, but coupling of the drive pinion 93with the shaft 92 is afforded by means of a clutch 91, the jaws of which will either engage the low speed drive pinion 93 (Fig. 8) or a high speed drive pinion 98 (Fig. '1). The high speed drivepinion 98 in turn engages a high speed gear 99 and this gear 99 is fastened directly to the gear 94. g

In the high speed position of the clutch 91,

the gear 93 is disengaged by the clutch and the gear 98 is engaged in order to furnish a high speed of rotation to the traction gear 96.

v is provided with a'pinion I62 at the lower end thereof adapted to engage the internal teeth of the turntable gear I63 for rotating the upper revolving frame on the turntable 32; .Obviously, the turntable which in turn drives a second appended claims.

may be rotated in one direction or the other as desired by engaging and disengaging the clutches 86 and 61. The shaft I6| may .be coupled to the gear 99 by means of the jaw clutch I64 for rotating the upper platform.

Traction clutch I 68 is provided which is splined to the traction drive shaft I61 and in its engaged position engages the gear 96 to the shaft I61 to drive the crawler tracks, this drive being provided by, means of a bevel gear I68 on the lower end of the shaft I61 which engages the bevel gear I69. The bevel gear I69 is keyed to a shaft. II I and this shaft in turn drives cliain sprockets I I2 and 'I I3 located on the opposite ends of shaft I69. The chain sprockets H2 and I I3 are adapted to be driven by means of jaw clutches H4 and H6 andeither of the chain sprockets H2 or 3 or both may be driven by engaging the. clutches H4 or H6. The members II1 are stationary v brakes for preventing rotation of the respective shafts. The chain sprockets H2 and 3 drive chains 8 and "9 which in turn drive the large tread sprockets 31.

The train of gears 93, 94 and 96 will provide a low speed, suitable while the shovel is in use in excavating and where considerable power is required but low speeds are all that are necessary. In. transporting the shovel from one Job to another, it is desirable that a high speed be provided and this high speed is provided by meansv of the .high speed gears 98 and 99. In using the high speed gearing the jaw clutch 91 is raised to disengage the gear 93 and engage the gear 98.

Ifthe jaw clutch I64'is engaged to the gear 99 and the clutch 91 engaged to gear 98, the upper revolving frame will revolve at high speed. If the clutch I64 is engaged to gear 99 and the clutch 91 engaged to the gear. 93 the table wilL rotate at low speed. ,1: the clutch m is disengaged and the clutch I66 engaged and the Jaw 'engaged, the clutch I64 disengaged and clutch 91. engaged to gear- 93, the tracks will be driven at low speed with corresponding increase in power. Engagement and disengagement of the double. jaw clutch 91 1s accomplished by the' operator through manipulation of the lever I2| which is operatively engaged to the-clutch. The

machine is controlled by the group-of levers indicated generally at I22 in accordance with the usual practice.

Obviously, my invention may be applied to wheel type cranes and shovels, whether railway cranes, road type wheels, flanged rail wheels or various types of traction locomotion.

It is apparent that modifications may be made by those skilled in the art. Such modifications may be made without departing from the spirit and scope oi my invention as set forth in the I claim as my invention: I

1 In an excavating shovel mounted on running gears having endless tracks, a. turntable, axprime mover on,the turntable, winding drums driven by the prime mover, a vertical shaft passing downward through the axis of the turn table. means for connecting this shaft with the wheels of the running gear, a pair of gear trains for driving the vertical shaft from the prime mover, and selective means for engaging me or the other of the gear trains, said gear trains including a pair of gears mounted-for rotation on a swing shaft and a means for selectivelyengaging thegears to the shaft.

2. In an excavating shovel, running gear, a

lower frame, an upper revolving frame, a prime the vertical drive shaft 'shaft, and clutch means engaging the traction drive shaft to the traction gage the idler gears, with the swing shaft, a

traction shaft, a gear rotatably mounted thereof the idler gears, and

on engaging with one the traction shaft with clutch means to engage the last mentioned gear.

3. In an excavating shovel, a lower frame, track rotatably mounted on the lower frame, means for driving the track, an upper frame shaft or the. swing shaft by rotatably mounted on the lower frame, a drive shaft for driving the track passing -down through the axis of rotation of the upper frame, a driven gear mounted for rotation on this vertical drive shaft, a clutch means for engaging th driven gear to the drive shaft, an idler shaft, a pair of gears on the idler shaft, one of which engages the. firstnamed gear, a a pair of gears on the drive shaft meshed with the first named pair of gears, and clutch means for engaging one or the other of the last named gears, and a prime mover operatively engaged for driving the drive shaft, the idler shaft adapted to be engaged with the pair of gears ounted thereon and cause the rotation of t e upper frame with respect to the lower frame.

4. In an excavating shovel, a lower frame, running gears on the lower frame, tracks on the running gears, and drive means for driving the track, a turntable rotatably mounted on the lower frame, a prime mover on the upper frame, .a power shaft. means for driving the power shaft/from the prime mover, ahoisting drum and crowd drum driven by the drive shaft, 9. reverse gear drive shaft driven from the main power shaft, bevel gearing, forward and reverse, driven by the reverse gear drive shaft, a first vertical shaft driven by the bevel gearing, a first gear train tical shaft.

driven'from said ver a second vertical drive shaft passing downwardly through the center axis of the vertical shaft for furnishing rotatably mounted on turntable, bevel gearing and a second train of drive gearing for driving thetracks from said second vertical shaft, said second vertical shaft being driven by the first named train of gears. and an alternative train of gears between the first named vertical shaft and' second named two speed drive to the tracks.

5. In an excavating shovel, a runninggear,

' a turntable pivotally mounted on the running gear, a prime mover on the turntable, a vertical drive shaft driven by the prime mover, a swing shaft, drive gears on the drive shaft, idler-gears the swing shaft amLengaging the drive gears, drive shaft for selectively driving one or the other ofv the drive gears mounted thereon, clutch means on the swing shaft for selectively driving the swing shaft through oneof the idler gears, on' the swing shaft, a traction drive shaft, a traction drive gear mounted on the traction clutch means on the a ing and shaft engaging one of the idler gears, and clutch means on the traction drive shaft for selec-- tively engaging and disengaging the drive gear. a

6. Inan excavating shovel, a vertical drive shaft, 9. pair of drive gears iournalled on the drive shaft; clutch means for selectively engaging the drive gears to the drive shaft, a swing shaft,ra pair of idler gears journalled on the swing shaft and meshing with the drive gears, clutch means for selectively engaging or disengaging the swing meshing with one of the idler gears on the swing for engaging and disdrive gear, said construction adapted to permit a change of speed of either the traction drive the operation of one clutch means.

'1. In an excavating shovel, a drive-(shaft and plural drive gearing means journalled on this drive shaft, a swing. shaft and plural gearing four-- nailed on the swing shaft meshing with the plura? gearing on the drive shaft, a traction drive shaft and a traction drive gear meshing with one of the gears 'on the swing shaft, clutch means on the first drive shaft for selectively driving the plural gearing, clutch means on t e swing shaft for endisengaging the swing shaft to the gearing on the swing shaft, and clutch means on drive shaft and the traction drive shaft for engaging with and disengaging from the traction drive shaft the gear iournalled on the traction drive shaft.

8. In an excavating shovel. a lower frame, running gear on the frame, an upper frame pivotally mounted on.the lower frame. a power means on the upper frame, a jack shaft, a vertical drive shaft, opposed bevel gears of equal size on the jack shaft, a bevel gear on the to be selectively engaged with one of the opposed bevel gears to selectively rotate the driveshaft in one direction or the other. a swing shaft, a plurality of drive gears on the drive shaft, a plurality of idler gears adapted to rotate as one rotatably mounted on the swing shaft and engaging the drive gears, clutch means on the drive shaft to selectively drive one of the drive gears to change speed, clutch means 'on the swing shaft for selectively driving the swing shaft through one of the idler gears, shaft engaging one of the idler gears, means on the traction drive shaft. I

9. 'Inan excavating device, a lower frame, endless tracks mounted thereon, an upper frame mounted for rotation on the lower frame, a power 'means on the upper frame, winding drums adapted to be driven therefrom, a jackshaft, a drive shaft driven from the jackshaft, a plurality of drive gears rotatably and independently mounted on this shaft,"clutch means for selectively engaging the drive to any one of the shaft said drive gears, a swing shaft, a plurality of and clutch swing shaft gears' mounted for rotation on the drive gear.

form, endless tracks on the 10. In an excavating device, including a platplatform for transporting the same, a turntable rotatably mounted on the platform and a power source on the tumshaft, a traction drive shaft drive shaft adapted a traction drive single jawed clutch and swing shaft take of! for; 1Q

selectively engaging intermediate gears in the double gear train for rotating the turntable, and

another single jawed clutch and traction take ofl shaft engaging the last gear of the'gear train for driving the endless tracks, the speed change for both the swing shaft and traction shaft being effected by means of the-two way clutch on the power take 011 drive shaft.

11. In an excavating device including a platform, endless tracks for transporting the platform, and a turntable on which the excavating device is mounted, a power means on the mtabie, drums! driven from the power me a power take 01! from the power means for rotating the turntable and driving the tracks, the power take 01!, including two gears of different pitch diameter, and a two way' clutch for selectively engaging and or the other of the gears, two driven gears driven from the first named gears, a swing drive shaft for rotating the tumtabie, a clutch for engaging this swing drive shaft to the last named gears, a fifth gear and a traction drive shaft for driving the endless tracks, and a clutch means for en'gagingand disengaging the traction drive shaft with the fifth gear.

' wimri'ran. BAKER. 

